Day 01 and 02 2019.

2019/02/Cargo.lock

@@ -0,0 +1,6 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "day-02"
+version = "0.1.0"
+

2019/02/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "day-02"
+version = "0.1.0"
+authors = ["Anders Olsson <anders.e.olsson@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

2019/02/input

@@ -0,0 +1 @@
+1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,1,6,19,2,19,6,23,1,23,5,27,1,9,27,31,1,31,10,35,2,35,9,39,1,5,39,43,2,43,9,47,1,5,47,51,2,51,13,55,1,55,10,59,1,59,10,63,2,9,63,67,1,67,5,71,2,13,71,75,1,75,10,79,1,79,6,83,2,13,83,87,1,87,6,91,1,6,91,95,1,10,95,99,2,99,6,103,1,103,5,107,2,6,107,111,1,10,111,115,1,115,5,119,2,6,119,123,1,123,5,127,2,127,6,131,1,131,5,135,1,2,135,139,1,139,13,0,99,2,0,14,0

2019/02/src/main.rs

@@ -0,0 +1,106 @@
+use std::env;
+use std::fs;
+
+fn main() {
+    let input = env::args().nth(1).expect("need an input file");
+
+    let data = fs::read_to_string(&input).expect("failed to read input file");
+
+    let intcode = data
+        .split(',')
+        .map(|value| {
+            value
+                .trim()
+                .parse::<usize>()
+                .expect("failed to convert value to u8")
+        })
+        .collect::<Vec<_>>();
+
+    let mut program = intcode.clone();
+
+    program[1] = 12;
+    program[2] = 2;
+
+    let mut pc = 0;
+
+    loop {
+        match program[pc] {
+            1 => {
+                let a_addr = program[pc + 1];
+                let b_addr = program[pc + 2];
+                let x_addr = program[pc + 3];
+
+                program[x_addr] = program[a_addr] + program[b_addr];
+                pc += 4;
+            }
+            2 => {
+                let a_addr = program[pc + 1];
+                let b_addr = program[pc + 2];
+                let x_addr = program[pc + 3];
+
+                program[x_addr] = program[a_addr] * program[b_addr];
+                pc += 4;
+            }
+            99 => {
+                break;
+            }
+            _ => panic!("invalid op code"),
+        }
+    }
+
+    println!("part_one={}", program[0]);
+
+    let mut noun = 0;
+    let mut verb = 0;
+
+    loop {
+        let mut program = intcode.clone();
+
+        program[1] = noun;
+        program[2] = verb;
+
+        let mut pc = 0;
+
+        loop {
+            match program[pc] {
+                1 => {
+                    let a_addr = program[pc + 1];
+                    let b_addr = program[pc + 2];
+                    let x_addr = program[pc + 3];
+
+                    program[x_addr] = program[a_addr] + program[b_addr];
+                    pc += 4;
+                }
+                2 => {
+                    let a_addr = program[pc + 1];
+                    let b_addr = program[pc + 2];
+                    let x_addr = program[pc + 3];
+
+                    program[x_addr] = program[a_addr] * program[b_addr];
+                    pc += 4;
+                }
+                99 => {
+                    break;
+                }
+                _ => panic!("invalid op code"),
+            }
+        }
+
+        if program[0] == 19690720 {
+            break;
+        }
+
+        noun += 1;
+
+        if noun > 99 {
+            noun = 0;
+            verb += 1;
+
+            if verb > 99 {
+                panic!("failed to find a valid input pair");
+            }
+        }
+    }
+
+    println!("part_two={}", 100 * noun + verb);
+}